Bucket



June ll, 1935. 1 B. scHAUl-:R 2,004,637

BUCKET Filed oct. 25, 19:55 z sheets-sheet 1` INVENTOR a renc@ az/er BWZa/,w

A ATTORNEY June 1l, 1935. L. B. scHAUER BUCKET Filed OCC. 25, 1935 2sheets-sheet 2 a INVENTOR rf/z e' 5 caaa" BY Zw ATTQRNEY l Patented June11, 1935 i UNITED sr rArE-Fr BUCKET Lawrence B. Schauer, lHuntingtonPark, Calif., assigner toRuth Dredger Manufacturing,Cor-Y poration,Ltd., Los Angeles, Calif., a corporation of California ApplicationOctober 23, 1933, Serial No. 694,700

2 Claims.

buckets.

\ Another object is to provide a renewable wear resisting lip to protectthe entire vdigging edge of the bucket from abrasion by the material inwhich the dredge isoperating.

Another object is to provide an improved at-r tachment means for thebucket hangers; still another object is the provision of the novelspring mechanism for closing the bucket door.y

This invention possesses many other advantages, and has other objectswhich may be made more easily apparent from a consideration of oneembodiment of the invention. For this purpose there is shown a form inthe drawings accompanying and forming part of the present specification.This form shall now be described in detail, which illustrates thegeneral principles of the invention; but it is to be understood thatthis detailed description is not to be taken in a limiting sense, sincethe scope of the invention is best dei-ined by the appended claims.

Figure 1 is a side elevation of a dredger bucket incorporating myimprovements, and shown in conjunction with a supporting conveyor chain;

Fig. 2 is an isometric view of the wear resisting lip;

Fig. 3 is a fragmentary elevation on an enlarged scale of the side ofthe bucket, showing the bracket for the rear bucket hangers;

Fig. 4 is a, section taken along plane 4--4 of Fig. 3;

Fig. 5 is a transverse section taken along plane 5 5 of Fig. 1;

Fig. 6 is a longitudinal section of the bucket showing the door indischarging position; and

Fig. 7 is a fragmentary section similar to Fig. 6, showing the door innormal, or closed position.

A common type of digging machine or dredger includes a pair of parallelendless chains, suitably supported as by pulleys or sheave wheels,having a plurality of buckets or scoops suspended from them. One end ofeach of these chains is suspended close to the material it is desired toexcavate. These chains are driven so as to cause the scoops or bucketsto enter the material, pick up a load as they pass through it, and carrythis load to a predetermined point, where they are dumped, after whichthey return for another load and the cycle is repeated. It is (ol.19a-14o) to buckets for this type ofjdredger that these improvements aredirected. f

Referring more particularly to the drawings,A

the supporting chains j each consist of links 9, f

secured by bolts or pins III. A bucket is indicated by I I, and ispreferablyformedfrom a'single piece of steel plate'or other equivalentmaterial, cut and bent to the desired shape, being welded Where deemedadvisable. By referring to Fig. 5`it will be noted that the sides I2diverge orflare toward the front and are'symmetrical about the I Securedat the forward upper corner of leach of sides I2, as by rivets, is acasting I4 with an upwardly projecting ear I5 adapted to receive one ofthe bolts IB used for securing the chain links 9 together. At the rearof each of the side plates is another casting I6, also secured by rivetsand of novel form. It includes a wall I1 (Fig. 4) arranged to lieagainst the side plate I 2 and a second wall I8 spaced therefrom, butjoining it near its lower end. Walls I'I and I8 have coaxial boresadapted to receive a bolt or pin I9 uponv which is pivoted an arm orlink 20. This link serves as a conformable support between the chains 8and the rear part of the bucket. In this way, as bucket II passes aroundany supporting sheave or pulley, the distance between the front and rearsupports (ears I4 and linksZ) can be shortened to correspond to thechord of the arc formed by chains 8. Preferably, the hanger or link 20is made as short as practicable. By referring to Fig. 4 it will beevident that wall I8 serves to support the outer end of bolt I9 and tokeep the'latter from being bent due to any forces which maybetransmitted by link 2U. Walls I'I and I 8 are connectedby web walls 2|(Fig. 3), for the purpose of limiting the motion of arm 20 about pin I9.Thus if the bucket II is supported as by resting on the bottom of theexcavation, or if chains 8 become slack for any reason, the chains 8will tend to drop from the position' shown in Figs. l and 6, which wouldcause arms 26 to turn about pins I9. The amount of this turning will belimited by one edge of arm 20 striking wall 2l as shown by broken linesin Fig. 3. In this way, since hangers 2) are short, and since stops areprovided for limiting the rotation of the hangers, there is never anydanger that the bucket I I will ever be urged to a position on the wrongside of the chains 8. Immediately below casting I 4 and extending to thebottom of the bucket, across the bottom between the latter and theU-bolts. The links and up the other side to the corresponding castarelobviously better adapted for wear than the ing Id is a wear resistantU-shaped lip 22 (Figs. spring, and are much `more easily replaced if 1,2, and6). This may be a casting of manganecessary. l nese steel orkother suitable alloy, and isy secured Secured to plate 25 as by rivetsis a rhomboidal in place by rivets 23, so as to be renewable when shapedcam casting 3|, having a flange 32 and a necessary. The forward edge maybe reduced in web 3 3. This member 37| y is designed to coact thicknessand substantiallyI sharp, so that less with aroller 34 (Fig. 6) andthereby to swing force will be required to force `the bucket throughplate 25 inwardly when it'is desired to empty the material to beexcavated, and to render/it, Athe bucket. This roller can beappropriately suppossible to cut through roots and similar obstrucportedon the conveyor system to cause the bucket tions which may beencountered therein. j 'Y -wtogbe emptied as it reaches a'place on thecon- At the upper edge of sideplates l2 near theirl Veyor system wherethe bucket assumes a downrear isa bolt 24 (Figs. 1,` 45Y and 7)?,extendingfward tilt.r Plate'thus acts to push the material between them,and upon which 'is Virric'nint`ed. a, Aoltw'arezly of Vthef bucket, whenthe cam member swinging piate 25. This formsth hacker the 3lisactilatedlby'roller 34- A pin 0r bolt 351s Sebucket. It is normallyheld resiliently in closed cured in'each side for the purpose oflimiting the fastened at the backedge ofythe bottom, and are ends uponthe links, the entire movement being position (Figs. 1, 5 and '7) asbyla pair oftension swing. of jplate 25.

springs 26. t I claim: r

The manner in which these springsare at` f' 1. In combination, anexcavator bucket adapttachedwill nowbe described. Intermediate the edtoubevconnected to conveyor chains, means lower edge of `plate 25andsupporting bolt V24 forpivotally connecting the'bucket adjacent itsarea pair of U-bo1ts'2'l, in'each of which is a chain front and rearvtoV thechains-,fincluding hangers link28, Through the link 28, theVupper end of `for the rearowf the buket,and-Stops on the bucket spring`26 is hooked.V Similar U-bolts 29 are lfor limiting rotation of thehangers.

Y 2.111A combination anexavator bucketadaptn also provided with links3B1 through which the ed to be connected to'zccnveyor-chains, :meanslower ends of springs 26 are hooked. These lower for pivotallyvconnecting the bucket adjacent*` its U-bolts also serve as stops tolimit the backward front and rear tothefchains, including (hangers swingof plate 25. 1 The interposition of links 28 vfor the rear ofthe-bucket, 'andears,fastened-.to and 30 kbetween the ends of spring 28and the -U the sides of the-bucket for the hangers, said ears bolts isfor the purpose of keeping the spring from having limiting y,surfacesfor the motionA of the Wearing, due to the swinging .ofthe back. Byhangers'fforv preventing improper motion `of the comparing Fig. 6 withFig. 'Zit will be noticed bucket Vwithrespectv to. the chains.

that there is practically no slippage ofthe spring j j l LAWRENCE B.vSCHAUER.

